How many atoms of oxygen are in one MOLE of #Al_2(CrO_4)_3 8H_2O#?

1 Answer
Oct 24, 2016

Answer:

Well, there are clearly (?) 20 oxygen atoms per formula unit of #Al_2(CrO_4)_3*8H_2O#. Agreed?

Explanation:

So thus in 1 mol of the aluminum chromate hydrate there must be 20 mol of oxygen atoms, i.e. #20xxN_A# #"oxygen atoms"#, where #N_A="Avogadro's number"# #=# #6.022xx10^23*mol^-1#. That's a lot of arithmetic.